Rear Window Defogger Relay

REAR WINDOW DEFOGGER RELAY

Description

Power is supplied to the rear window defogger with BCM control.


Component Function Check


1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when turning the rear window defogger switch ON.
Is the inspection result normal?
YES- Rear window defogger relay power supply circuit is OK.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Electrical Diagrams.

1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT

1.Turn ignition switch ON.
2.Check voltage between BCM connector and ground.





Is the inspection result normal?
YES- Rear window defogger power supply circuit is OK.
NO- GO TO 2.

2. CHECK HARNESS CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect BCM and fuse block (J/B).
3.Check continuity between BCM connector and fuse block (J/B) connector.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness.

3. CHECK REAR WINDOW DEFOGGER RELAY

Check rear window defogger relay.
Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident
NO- Replace rear window defogger relay.


Component Inspection


1. CHECK REAR WINDOW DEFOGGER RELAY






Check rear window defogger relay.





Is the inspection result normal?
YES- Inspection End.
NO- Replace rear window defogger relay.